Preforming of preheated plastic pellets for use in transfer mold

Details Preforming of preheated plastic pellets for use in transfer mold Preforming of preheated plastic pellets for use in transfer mold

1984-07-03

1986-02-11

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264 26, 26427214, 26427215, 26427217, 2643285, 26432817, 264322, 264325, B29C 4514

Patent

active

045698147

ABSTRACT:
Prior to supplying plastic encapsulant to the reservoir of a mold for the purpose of encapsulating semiconductor devices, pellets of the encapsulant are heated until they become soft. An operator then places the pellets into a preforming chamber where they are compressed to form a softened charge of encapsulant. This charge is then removed from the chamber and placed into the reservoir of the mold.

REFERENCES:
patent: 3473196 (1969-10-01), Hull et al.
patent: 4374795 (1983-02-01), Keilp et al.
patent: 4480975 (1984-11-01), Plummer et al.

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